d96b595bbd
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6667 ec53bebd-3082-4978-b11e-865c3cabbd6b
91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
/*
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* Copyright (c) 1999 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kungliga Tekniska
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* Högskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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RCSID("$Id$");
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krb5_error_code
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krb5_expand_hostname (krb5_context context,
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const char *orig_hostname,
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char **new_hostname)
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{
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struct hostent *he = NULL;
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int error;
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char *tmp;
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#ifdef HAVE_IPV6
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{
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struct in6_addr sin6;
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if (he == NULL && inet_pton (AF_INET6, orig_hostname, &sin6) == 1)
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he = getipnodebyaddr (&sin6, sizeof(sin6), AF_INET6, &error);
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}
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#endif
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{
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struct in_addr sin;
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if (he == NULL && inet_pton (AF_INET, orig_hostname, &sin) == 1)
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he = getipnodebyaddr (&sin, sizeof(sin), AF_INET, &error);
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}
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#ifdef HAVE_IPV6
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if (he == NULL)
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he = getipnodebyname (orig_hostname, AF_INET6, 0, &error);
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#endif
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if (he == NULL)
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he = getipnodebyname (orig_hostname, AF_INET, 0, &error);
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if (he == NULL) {
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*new_hostname = strdup (orig_hostname);
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if (*new_hostname == NULL)
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return ENOMEM;
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return 0;
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}
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tmp = he->h_name;
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if (strchr (tmp, '.') == NULL
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&& he->h_aliases != NULL
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&& he->h_aliases[0] != NULL
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&& strchr (he->h_aliases[0], '.') != NULL)
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tmp = he->h_aliases[0];
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*new_hostname = strdup (tmp);
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freehostent (he);
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if (*new_hostname == NULL)
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return ENOMEM;
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return 0;
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}
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